31323030231 has 8 divisors (see below), whose sum is σ = 42082850304. Its totient is φ = 20722615160.

The previous prime is 31323030173. The next prime is 31323030259. The reversal of 31323030231 is 13203032313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31323030231 - 2²³ = 31314641623 is a prime.

It is a super-2 number, since 2×31323030231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31323030198 and 31323030207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31323030131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39850791 + ... + 39851576.

It is an arithmetic number, because the mean of its divisors is an integer number (5260356288).

Almost surely, 2^31323030231 is an apocalyptic number.

31323030231 is a deficient number, since it is larger than the sum of its proper divisors (10759820073).

31323030231 is a wasteful number, since it uses less digits than its factorization.

31323030231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79702501.

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 31323030231 its reverse (13203032313), we get a palindrome (44526062544).

The spelling of 31323030231 in words is "thirty-one billion, three hundred twenty-three million, thirty thousand, two hundred thirty-one".